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Apologies for duplication.

I'm resetting my platform after many years to something that might be termed 'Sierra's best practices' but there are so many threads and not just a little confusion. Certainly on my part.

The main consideration for why to choose a specific time zone for a chart is Daylight Saving Time and the fact that the US changes on a different date than the rest of the world.

Therefore, it is best to have your time zone set to one of the US time zones that changes on the same date as the CME Group. This could be Central (where the CME Group is located), Eastern, Mountain, or Pacific. The choice of which one is personal and could be chosen based on where you live. For more information on this, refer to the following:
Time Zone Setting: Resolving Differences with the Transition To/From Daylight Savings Time in Different Time Zones

With regards to the Session Times, you would need to set those based on the actual open/close times for the time zone that you have set. In general this should work properly using the default information in the Symbol Settings (i.e. when you open a chart the default Session Times should be correct). But, if you are having issues, then look at the times at the CME Group website for the instruments you want and adjust accordingly. Refer to the following for more information on setting the Session Times:
Chart Session Times

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My PC Date/Time Settings
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Location (UK)
Computer Time Zone (UTC +00:00)
Daylight Saving (On)
Contract: CME ES



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Sierra Chart Settings
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Global Settings >> Time Zone Settings:
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London (+0 GMT/+1 BST)


Global Settings >> Symbol Settings:
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Symbol: ES?##
Time Zone: New York (-5 EST/-4 EDT)
Session Start Time: 09:30:00
Session End Time: 16:14:59
Evening Start Time: 16:15:00
Evening End Time: 09:29:59
Start New Bar At Start Time: yes (does 'yes' refer to using the time below?).
New Bar Daily Start Time: 18:00:30



Chart Settings >> Session Times:
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Session Start Time: 09:30:00
Session End Time: 16:14:59

Use Evening Session: Yes
Evening Start Time: 16:15:00
Evening End Time: 09:29:59



Data/trade Service Settings >> Historical daily Data:
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Historical daily Data Download (17:45:00)
Historical Daily Data Download Time Time Zone Zone List: New York (-5 EST/-4 EDT)